INTERRELATION BETWEEN SKID RESISTANCE ROAD SURFACE TEXTURE AND WATER FILM

The influence of a water film on the coefficient of longitudinal friction for a locked wheel was investigated for several conditions of road surface. A skiddometer (type BV 8) was used with the ASTM test tire, and the water film depth was measured by means of a comb with an accuracy of 0.2 mm. The results of the measurements are discussed, and it was concluded that skid resistance reduces when thickness of the water film or speed increases, and that the texture of the surfacing has a great importance for the friction coefficient. A minimum 0.4 mm sand patch depth is proposed (in Sweden) for all road surfacings with tolerable speed above 80 km/h. Macrotexture alone is not sufficient and a certain degree of microtexture is also necessary. Water accumulations thicker than 1 mm due to uneveness, long flowpath, and lack of slope are dangerous and must be avoided. It is also noted that porous asphalt may be considered as a surfacing with a high degree of macrotexture. An additional advantage is that evacuation of water through the layer is possible.

• Supplemental Notes:
  • Proceedings of International Symposium on Porous Asphalt, Amsterdam, Netherlands, May 31 to June 2, 1976.
• Corporate Authors:

  Study Centre for Road Construction, Netherlands

  14a Jansbuitensingel
  Arnhem,   Netherlands 
• Authors:
  • Huschek, S
• Conference:
  • Proceedings of International Symposium on Porous Asphalt, Amsterdam, Netherlands, May 31 to June 2, 1976.
• Publication Date: 1977

Media Info

• Features: Figures; References;
• Pagination: p. 9-15

Subject/Index Terms

• TRT Terms: Bituminous materials; Coefficient of friction; Films (Coatings); Hydroplaning; Motor vehicles; Pavements; Porous materials; Porous pavements; Skid resistance; Skid resistance tests; Speed; Surface course (Pavements); Surface treating; Texture; Traffic speed; Water; Wet weather
• Uncontrolled Terms: Wet pavements
• Old TRIS Terms: Bituminous surfacing; Locked-wheel; Water film
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 00163664
• Record Type: Publication
• Report/Paper Numbers: S.C.W. Record 2 Proceeding
• Files: TRIS
• Created Date: Mar 14 1978 12:00AM